CVE-2009-2496

Heap-based buffer overflow in the Office Web Components ActiveX Control in Microsoft Office XP SP3, Office 2003 SP3, Office XP Web Components SP3, Office 2003 Web Components SP3, Office 2003 Web Components SP1 for the 2007 Microsoft Office System, Internet Security and Acceleration (ISA) Server 2004 SP3 and 2006 SP1, and Office Small Business Accounting 2006 allows remote attackers to execute arbitrary code via unspecified parameters to unknown methods, aka "Office Web Components Heap Corruption Vulnerability."

Published: 2009-08-12 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-2496 is rated High Risk (67.9/100): CVSS Critical severity, with high exploitation likelihood (EPSS 55.46%, 98th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2009-2496

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-02-28 59.02% 55.46% -3.56%
2 2026-01-01 61.26% 59.02% -2.25%
3 2025-03-30 — 61.26% —

Full EPSS history (25 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-2496

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.3 2.0 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.6 10.0 [email protected]

Weakness enumeration for CVE-2009-2496

Affected software / configurations for CVE-2009-2496

Vendor Product Version Raw CPE
microsoft biztalk_server 2002 cpe:2.3:a:microsoft:biztalk_server:2002:*:*:*:*:*:*:*
microsoft internet_security_and_acceleration_server 2004 cpe:2.3:a:microsoft:internet_security_and_acceleration_server:2004:sp3:enterprise:*:*:*:*:*
microsoft internet_security_and_acceleration_server 2004 cpe:2.3:a:microsoft:internet_security_and_acceleration_server:2004:sp3:standard:*:*:*:*:*
microsoft internet_security_and_acceleration_server 2006 cpe:2.3:a:microsoft:internet_security_and_acceleration_server:2006:sp1:enterprise:*:*:*:*:*
microsoft internet_security_and_acceleration_server 2006 cpe:2.3:a:microsoft:internet_security_and_acceleration_server:2006:sp1:std:*:*:*:*:*
microsoft office — cpe:2.3:a:microsoft:office:-:*:small_business_accounting_2006:*:*:*:*:*
microsoft office 2003 cpe:2.3:a:microsoft:office:2003:sp3:*:*:*:*:*:*
microsoft office xp cpe:2.3:a:microsoft:office:xp:sp3:*:*:*:*:*:*
microsoft office_web_components 2000 cpe:2.3:a:microsoft:office_web_components:2000:sp3:*:*:*:*:*:*
microsoft office_web_components 2003 cpe:2.3:a:microsoft:office_web_components:2003:sp1:2007_microsoft_office:*:*:*:*:*
microsoft office_web_components 2003 cpe:2.3:a:microsoft:office_web_components:2003:sp3:*:*:*:*:*:*
microsoft office_web_components xp cpe:2.3:a:microsoft:office_web_components:xp:sp3:*:*:*:*:*:*
microsoft visual_studio_.net 2003 cpe:2.3:a:microsoft:visual_studio_.net:2003:sp1:*:*:*:*:*:*

References for CVE-2009-2496

cvelogic Threat Intelligence